Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b2127659940d5d…

MALICIOUS

PDF

34.3 KB Created: 2020-06-10 00:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 42cfda4f25acf475265dd06cd8c19024 SHA-1: e10e4129838366b2b8a1cd934cb0226ef47779c5 SHA-256: 47b2127659940d5d9fc07da78c99e6198032cbbef8fce8502e5f6bd81d0f9d76
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to domains designed to appear as legitimate file-sharing or content sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, a common tactic for SEO poisoning or distributing malicious content. The document body, though heavily obfuscated, contains references to anatomical terms and the wkhtmltopdf application, suggesting a lure document. The primary intent appears to be directing users to potentially malicious external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cleviagrandclean.devsite-1.com/uploads/1/3/0/5/130551491/130551491.html#anatomie+membre+sup%25C3%25A9rieur+pdf PDF link annotation
    • http://firstsipwithk.com/uploads/1/3/1/6/131607062/zotifovu.pdfIn PDF document text
    • http://mydarlingvalentine.com/uploads/1/3/0/4/130488357/dunikewawu.pdfIn PDF document text
    • http://mail.anglia.id/uploads/1/3/0/7/130739640/koxepupuxuxipet.pdfIn PDF document text
    • http://leavesbgone.net/uploads/1/3/1/4/131454459/xunow-bigidelofinib-jawipufanuwopi-kilixepaxupuvo.pdfIn PDF document text
    • http://tripsthereandback.com/uploads/1/3/0/5/130551210/5400721.pdfIn PDF document text
    • http://dottedlinenotarysvc.com/uploads/1/3/0/3/130313111/a235b47a583.pdfIn PDF document text
    • http://mail.hemlockhappening.org/uploads/1/3/0/4/130492038/2341684.pdfIn PDF document text
    • http://jobsight365.com/uploads/1/3/0/5/130588452/mitader-setuzi-sukapamoduji-pewuduwegedaked.pdfIn PDF document text
    • http://mail.christianhollowfarm.com/uploads/1/3/1/3/131379832/1000977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://doxigalik.files.wordpress.com/2020/06/90651629347.pdfIn PDF document text
    • https://xuvifix.files.wordpress.com/2020/06/4211460681.pdfIn PDF document text
    • https://nekalojowaj.files.wordpress.com/2020/06/fujakunenaxo.pdfIn PDF document text
    • https://wegekivosum.files.wordpress.com/2020/06/fawenefanu.pdfIn PDF document text
    • https://gikakuwadin.files.wordpress.com/2020/06/wafovatumozijow.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5879 10956 bytes
SHA-256: 58bc47caacfff3de6800d0873e70b30f30a3f143f079dab018177d348ec4b854

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